Outbound Multicast Configuration
When the multicast transmission source is on the protected or secure interface of a Security
Appliance, you must specifically configure the Security Appliance to forward the multicast
transmissions. The following configuration steps enable this multicast configuration:
Step 1 Use the multicast interface command to enable multicast forwarding on
each Security Appliance interface.
Step 2 Use the mroute command to create a static route from the multicast
transmission source to the next-hop router interface.
Multicast
Router
Protected
Network
Multicast Traffic
Flow
296 Chapter 11: Routing and the Cisco Security Appliance
Suppose that your multicast router is located at 10.10.10.100 and broadcasting to the
multicast group 230.0.1.100. To get the Security Appliance to forward multicast
transmissions from this multicast router to the outside interface, you would use the following
commands:
pix515a(config)# multicast interface outside
pix515a(config-multicast)# exit
pix515a(config)# multicast interface inside
pix515a(config-multicast)# mroute 10.10.10.100 255.255.255.255
inside 230.0.1.100 255.255.255.255 outside
pix515a(config-multicast)# exit
pix515a(config)#